Google announced last week the launch of a major expansion of its Google Assistant across ‘eligible’ Android Marshmallow and Nougat devices. The company first revealed plans to widely roll out Assistant during Mobile World Congress earlier this month.

However, Google does not have a list of those eligible devices; the company only promises that “hundreds of millions of Android users” will now be able to try Google Assistant instead of the voice search features that were in place before. Android users in the United States will receive the update first, with Australia, Canada, the United Kingdom, and Germany to follow.

There is no Google Assistant app to download or anything like that. Instead, Google is adding the functionality through an update to Google Play Services. So if you see that update pop up in the Google Play store, you will know you are getting Assistant.

Google Assistant will likely feel very familiar to the old search interface, though Assistant is slowly picking up new abilities and helpful tricks that were not there before. For now, you have the convenience of long-pressing the home button to activate Assistant.